Improvement in the manufacture of glue



A. DIETZ. MANUFACTURE 01 GLUE.

No. 103,852. Patentefilline 7,1870;

pa e dbjiflhze.

ANDREWDIETZ, or NEwYoRK, Y,

Letters Patent No. 103,852, dated June 7, 1870.

IMPROVEMENT IN THE MANUIiA'CTU'RE OF GLUE.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern.-

Be it known that I, ANDREW DIETZ, of the city of New York, in the countyof New York and State of New York, have invented a new and usefulImprovement in the Process of Manufacturing Glue; and I do herebydeclare that the following is a full, clear,

and exact description thereof, and of its mode or manner of operation,reference being bad to the accompanying drawing and to the letters ofreference marked thereon and making a part of this specification.

Ths nature of my invention consists in the production and arrangement ofan apparatus, by means of which glue, taken directly from theboiling-kettles, can be quickly and effectually chilled and stiffened,

by the use of which it is possible to manufacture glue in summer, aswell as in the cooler seasons, and from green stock, thereby saving theexpense of preparing the glue-stock by liming, drying, 8E0. Figure 1 isa. general perspective view of an apparatus adapted for cooling glue, asit is taken directly from the boiling-kettle.

Figure 2 is a vertical sectional view of fig. 1. Figure 3 is an enlargeddetached view of the valve,

for discharging the glue from the kettle, andalso into.

the chilling-pans. Y

The manufacture of glue, as-eli'ected by the ordinary process or manner,is necessarily carried on during the cold weather, so that the glue,after being sufficiently boiled, will be chilled or cooled and partiallyhardened and stiffened by the cool atmospheric air, after which it iscut into slices and placed on the drying-nets, where it remains,depending wholly upon the weather, until it is fully dried.

In the neighborhood of cities a great deal of the best glue-stock,such'as cattles feet, is gathered, however, during the summer season,but to preventv decomposition, and consequent injury to the glue, suchstock has to be put into lime-vats and unhaired, and

afterward dried, so that it can be preserved until cold weather, whenthe glue is made.

All this time, labor, and expense of preparing the glue-stock, can besaved by my invention, as by it-the stock can be used in its green stateas soon as received, and converted into glue at all seasons of the year,in the summer as well as in cool weather.

The boiling-kettle A is constructed in the usual manner, and should havewithin it a wire or other basket, a, to hold and retain the glue-stock,after the gelatine has been extracted from it by boiling.

Connected with or leading from such boiler is an inclined covered troughor pipe, B, into which the-glue is receiveddirectly from the boiler, andby which it is conveyed to the co0ling-pans 6, which are made of metal,preferably of zinc, and should be broad and shallow.

At each end of such conveyer B are valves or cocks 1 2, which aresoconstructed as to discharge the liquid glue in a thin,broad sheet.

This is effected by having the valveseat cylindrical, 4 and making thedischarge-orifice therein long and narrow, as shown at 3, fig. 3, thelengthof such orifice being about equal to the width of the cooling-pans6, and cutting away one side or half of the valve or cock, as also shownat 4, fig. 8, so that as the valve is turned in one direction, the orice 3 will be opened its whole length, so as to permit the glue to bedischarged in a thin, broad current, but when turned in the otherdirction, will close such orifice and stop the flow of the glue. v

To render it possible to carry on the manufacture of glue in the summerseason, or when the temperature of the air is much above the freezingpoint, theglue, after it is discharged from the boiling-kettles, must befirst chilled or hardened,s0 that it can be afterward dried, and allmoisture expelled. I

Such chilling or hardening I accomplish by means of the shallow pans 6,which may be of any size desired, but are usually of a width aboutcorresponding with the length of the discharging-orifice 3, and a cooling-chamber, O, which has within it ice-boxes or receptacles c c, andthe topz of which is covered with slats, or perforated with holes, asshown in fig. 2.

Into and through this cooling-chamber. air is constantly forced by meansof a blower, D, worked by a wheel and band, dd, and over such chamberthe pans 6 aremade to pass at any rate of motion required, by means ofanendless band, on which the pans are placed, and which passes overrollers ff, be revolved in any convenient manner.

The chamber 0 must be kept supplied with ice in Slllfifllfilltquantities to reduce the temperature of the air passing through it toabout 40- Fahrenheit,'or a few degrees above freezing point, so as: tochill and harden the surface of the glue, without freezing it, asfreezing greatly injures the article. Y

A portion of the cold air passing through the chamber 0 is also made topass, by means of a pipe, 9, into and up through the delivery-trough orconduit B, thereby cooling, to .some extent, the glue before it isdischarged into the pans.

The pans b are retained in contact with or subjected to the influence ofthe cooling-chamber 0 until the surface of the glue is sufiicientlychilled or hardened to permit it to be removed from the pans into adrying-room, into which cold air is forced until the surfaces of theglue become thoroughly hardened, and the whole mass stiffened when steamheat can be used in gradually-increasing quantities until the whole massis thoroughly dried. The quantity ofair admitted into the chamber '0 maybe regulated by the stop-cock h.

which may Other means than ice for artificially cooling the air I as itis taken from the boiling-kettle, it will be evident that the process ofmaking glue can be carried on as well in the summer asin cooler Weather,and that new or green glue stock can be at once converted into glue,thus rendering unnecessary the liming and drying preparation nowrequired, thus saving all the time, 1abor, and expense spent for suchpurpose.

What is claimed is- 1. Theprocess of chilling and hardening glue, as itof air reduced to a temperature but few degrees above thefreezing point,for the purpose set forth.

2. The arrangement of the blower D, cooling-chamher 0, provided withice-boxes or other cooling-media, and cooling-pans 6, or otherequivalent, substantially as and for the purposes set forth,

3. The construction of the sleeve-valve 1 or 2, or its equivalent, fordischarging the glue in a thin, broad stream, for the purposes setforth.

' ANDREW DIETZ.

Witnesses:

S. D. LAW, FEED. B. SEARS.

is taken from the boiling-kettle, by means of currents

